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CVE-2021-42340

Public on 2021-10-14
Modified on 2024-01-17
Description

A memory leak flaw was found in Apache Tomcat, where an HTTP upgrade connection does not release for WebSocket connections once the WebSocket connection is closed. If a sufficient number of such requests are made, an OutOfMemoryError occurs, leading to a denial of service. The highest threat from this vulnerability is to system availability.

Severity
Important
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CVSS v3 Base Score
7.5
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Tomcat8.5 Extra tomcat 2023-08-21 20:58 ALAS2TOMCAT8.5-2023-006
Amazon Linux 2 - Tomcat9 Extra tomcat 2023-08-21 20:58 ALAS2TOMCAT9-2023-006
Amazon Linux 1 tomcat8 2021-10-29 16:37 ALAS-2021-1546

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD CVSSv2 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P
NVD CVSSv3 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H